Paleozoic Foraminifers
نویسندگان
چکیده
منابع مشابه
Origination and extinction components of taxonomic diversity: Paleozoic and post-Paleozoic dynamics
—Changes in genus diversity within higher taxa of marine animals on the temporal scale of a few million years are more strongly correlated with changes in extinction rate than with changes in origination rate during the Paleozoic. After the Paleozoic the relative roles of origination and extinction in diversity dynamics are reversed. Metazoa as well as individual higher taxa shift from one mode...
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In view of the extensive use of foraminifers for the pollution monitoring especially their unmatched utility in deciphering the temporal variation in the type and concentration of pollutants at a given location, the literature dealing with the application of foraminifers for pollution studies has been reviewed. The pollution monitoring through foraminifers started with attribution of peculiar f...
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In this study, we show that the rate of shell precipitation in the extant planktic foraminifer Orbulina universa is sufficiently rapid that 12 h calcification periods in O-labeled seawater can be resolved and accurately measured using secondary ion mass spectrometry (SIMS) for in situ dO analyses. Calcifying O. universa held at constant temperature (22 C) were transferred every 12 h between amb...
متن کاملEccentricity-paced late Paleozoic climate change
Article history: Received 24 April 2011 Received in revised form 7 March 2012 Accepted 10 March 2012 Available online xxxx
متن کاملA Late Paleozoic climate window of opportunity.
The highest rates of global organic carbon burial (up to 6.5 × 10 mol/Myr) over the past half billion years occurred during the Carboniferous–Permian (330–260 Myr), in large part because of the accumulation and burial of peat in broad tropical lowland basins (1). Atypical rates of organic carbon sequestration led to low atmospheric pCO2 and anomalously high pO2 (Fig. 1), which in turn triggered...
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ژورنال
عنوان ژورنال: Science
سال: 1969
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.165.3889.204